1978 GS550 Headlight and High Beam indicator not working

[edwinastafanus]

Hey all! New to the forum and GS ownership, so go easy on me! Doing my best to learn as much as I can, but it's a slow process.

My new GS550 is giving me some small issues... All the lights on the bike work. Like literally everything, including the gauge lights, but for some reason my headlight won't work and my high beam indicator won't work. The headlight won't work on any positions, whether high, low, or pass. The taillight comes on just fine, and the brake light works just fine is well. It's just the dang headlamp and high beam indicator. My bulb looked a little rough, so I bought a new one, figuring I'd start with the simplest solution, but obviously it didn't work, so here I am...

Does anyone have any advice on what to check, or what it could be? Doing my best to follow along with wiring diagrams, but the wiring on my bike isn't the cleanest ordeal. Also, the bike is one a single fuse system, if that helps.

Really appreciate any help from you guys!

Edwin

[Steve]

Might it be as simple as moving the headlight switch to ON?

Your bike does have a separate switch for the headlight, try moving it.

.

[edwinastafanus]

Already tried! The taillights will come on, but the headlight won't...

[roeme]

Get a test light, or better, a multimeter, then trace back starting from the headlight socket.

If there's power arriving at the headlight socket, then the return path is broken.

[edwinastafanus]

Thanks for the tip on the multimeter! Figured it out. Just a loose connection from the ignition to the dimmer switch. What a pain in the ass... Thanks a lot guys! Really appreciate all of your help.